I am not sure if they can hold them but one thing that might make it go faster is to just give them one adult name for each reservation so they can be booked. Then go back and add the other guests, either in the same call or call back at a different time.
I did this when booking my SV rooms for BLT--I needed a 2 bedroom and 2 studios so I just said I wasn't sure who was a definite yet. I have not yet called back and updated names because we are still figuring it out.
Good luck!